Patents by Inventor Harumi Tsuruta

Harumi Tsuruta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Solution for suppressing deterioration of a separation column for analyzing hemoglobins
    Patent number: 5468379
    Abstract: In the analysis of hemoglobins in blood samples by chromatography, an increase in the pressure in a flow passage line is suppressed, a separation column is made durable against prolonged use by supplying phosphate-based buffer solutions as eluting solutions to a separation column and a solution containing not more than 100 mM of S-(carboxyalkyl)-L-cysteine and phosphate-based buffer agent thereto in the course of a series of analyzing steps.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: November 21, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Yasuda, Yoshinori Takata, Harumi Tsuruta, Sadabumi Ohnuma, Junkichi Miura
  • Method of analyzing hemoglobins
    Patent number: 5358639
    Abstract: In the analysis of hemoglobins in blood samples by chromatography, an increase in the pressure in a flow passage line is suppressed, a separation column is made durable against prolonged use by supplying phosphate-based buffer solutions as eluting solutions to a separation column to a separation column and a solution containing not more than 100 mM of S-(carboxyalkyl)-L-cysteine and phosphate-based buffer agent thereto in the course of a series of analyzing steps.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: October 25, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Yasuda, Yoshinori Takata, Harumi Tsuruta, Sadabumi Ohnuma, Junkichi Miura